It wouldn’t stand up to traffic pattern analysis:

• VPN traffic tend to have very uniform traffic pattern
• Most VPN traffic runs on UDP, not TCP
• All VPN protocols that I’m aware of have characteristic handshake patterns, even wireguards extremely fast 1-RTT handshake.
• HTTPS traffic is very bursts and TCP retransmission patterns look very distinct.

But then I doubt an ISP would run deep traffic pattern analysis on all traffic. So you’d probably be fine.

But yeah, setting up your own VPN server on some random 1-core/2 GB RAM server is extremely easy.